Where did you hear about (a website, a friend, an email)? Is it an app, a website, or a document ?
However, the phrase "Lettore" (Reader/Player) and "Musicale" (Musical) in an Italian context often appears in academic or archival materials. Lettore paradiso musicale 1.3.2
A segment in a thesis regarding the structure of literature. Where did you hear about (a website, a friend, an email)
It could be a misnomer for a music streaming service or a reading app for musical literature. an email)? Is it an app
What is its (reading music, listening to music, reading literature)?